Unveiling the orbital-selective electronic band reconstruction through the structural phase transition in

N Mitsuishi, Y Sugita, T Akiba, Y Takahashi… - Physical Review …, 2024‏ - APS
Tantalum ditelluride (TaTe 2) belongs to the family of layered transition metal
dichalcogenides but exhibits a unique structural phase transition at around 170 K that …

[HTML][HTML] Dimensionality-driven power-law gap in the bilayer TaTe2 grown by molecular-beam epitaxy

BK Saika, S Yoshida, M Pardo-Almanza, N Mitsuishi… - APL Materials, 2024‏ - pubs.aip.org
Reducing dimensionality can induce profound modifications to the physical properties of a
system. In two-dimensional TaS 2 and TaSe 2, the charge-density wave phase accompanies …

Unusual photoinduced crystal structure dynamics in TaTe2 with double zigzag chain superstructure

J Koga, Y Chiashi, A Nakamura, T Akiba… - Applied Physics …, 2024‏ - iopscience.iop.org
Transition metal dichalcogenides with superperiodic lattice distortions have been widely
investigated as the platform of ultrafast structural phase manipulations. Here we performed …

Femtosecond trimer quench in the unconventional charge-density-wave material

T Domröse, C Ropers - Physical Review B, 2024‏ - APS
Ultrafast optical switching of materials properties promises future technological applications,
enabled by fundamental insights about microscopic couplings and nonequilibrium …

Molecular Formation and Precursory Local Distortion in Layered LiVX2 (X = O, S, Se)

N Katayama, K Kojima - Journal of the Physical Society of Japan, 2024‏ - journals.jps.jp
In systems with charge and orbital degrees of freedom, spontaneous molecular formation
phenomena occur at low temperatures as these degrees of freedom become entangled with …

Electronic Landscape of Group-5 Transition Metal Ditellurides MTe2 (M = V, Nb, Ta): Multiple Crystal Phases with Local Bonds and Flat Bands

N Mitsuishi, K Ishizaka - Journal of the Physical Society of Japan, 2024‏ - journals.jps.jp
Group-5 transition metal ditellurides M Te2 (M= V, Nb, Ta) are unique CdI2-type layered
materials that exhibit peculiar quasi-one-dimensional intralayer superstructures, known as …

Ultralow two-channel thermal conductivity in aikinite

J Li, L Wei, Z Ti, J Zhu, W Zhai, H Li, PF Liu - Materials Today Physics, 2024‏ - Elsevier
Realizing glass-like ultralow lattice thermal conductivity κ L in an ordered crystalline material
is overwhelmingly appealing for various applications in thermoelectrics and thermal barrier …

Zigzag chain order of develo** away from the vanadium trimer phase transition boundary

K Kojima, N Katayama, K Sugimoto, N Hirao, Y Ohta… - Physical Review B, 2023‏ - APS
The phenomenon of self-assembly of constituent elements to form molecules at low
temperatures appears ubiquitously in transition metal compounds with orbital degrees of …

Pseudo-one-dimensional ribbon chain cluster realized under high pressure in

T Hara, N Katayama, S Kitou, K Kojima, S Kawaguchi… - Physical Review B, 2024‏ - APS
We present a high-pressure single-crystal x-ray structure analysis of two-dimensional
layered 1 T-VSe 2, which is known to undergo an incommensurate charge density wave …

Control of Surface Structure in TaTe2

T Takeda, S Kobayashi, H Akimoto… - Journal of the Physical …, 2025‏ - journals.jps.jp
We conducted STM observations on pristine TaTe2 and sulfur-substituted TaTe2 at 4.2 K. In
the pristine sample, we observed the Te 3× 3 structure reflecting the underlying Ta butterfly …